function cle(){
  var a = document.getElementById('ps');
  var b = a.innerText;
  a.style.color='#000';
  alert(b);
  var aa=0;
  console.log(bon);
}
var bon = false;
if(bon){
  console.log('正确');
}else {
  console.log('错误');
}
// 数 组
var arr = [2,3,3,3];
var p = arr[0];
// 对象
var obj={
  name:'wc',
  age:23
}
var name = obj['age'];
var name1 = obj.name;
var b = isNaN('2');


console.log(b);
[{
  name:'wc',
  age:23
},{
  name:'lx',
  age:23
},{
  name:'lx',
  age:23
},{
  name:'lx',
  age:23
},{
  name:'lx',
  age:23
}]

for(var a in arr){
  console.log(arr[a]);
}
for(var i=0;i<arr.length;i++){
  console.log(arr[i])
}
console.log('你好,我在');
